/Engine/Source/Runtime/RenderCore/Public/RendererInterface.h
Experimental: Render multiple view families in a single scene render call. All families must reference the same FScene. Scene Capture not yet supported.
void BeginRenderingViewFamilies ( [FCanvas](API\Runtime\Engine\FCanvas) * Canvas, [TArrayView](API\Runtime\Core\Containers\TArrayView)< [FSceneViewFamily](API\Runtime\Engine\FSceneViewFamily) * > ViewFamilies )